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A Noncontact Voltage Measurement System for Power-Line Voltage Waveforms | IEEE Journals & Magazine | IEEE Xplore

A Noncontact Voltage Measurement System for Power-Line Voltage Waveforms


Abstract:

This paper presents the design and implementation details of a complete noncontact (NC) voltage acquisition system, which allows the measurement of power-line voltage wav...Show More

Abstract:

This paper presents the design and implementation details of a complete noncontact (NC) voltage acquisition system, which allows the measurement of power-line voltage waveforms without galvanic contact. The system is composed by a novel capacitive probe, an analog front end (AFE), and a microcontroller-based digital signal processing stage. A deep experimental characterization of the noncontact measurement system was performed. The tests reported a high linearity (maximum nonlinearity of ±0.2%), a low input-referred noise (11 mVrms), and a low-frequency response distortion. Measurements of ±330-V triangular waveform signals were performed with maximum instantaneous errors below ±1.5 V. The power-line voltage (220 Vrms at 50 Hz) was acquired without galvanic contact with an instantaneous error lower than ±3 V, whereas the mean error on rms voltage measurements was 0.32% and the maximum 0.7%. A two-day continuous measurement of power-line voltage was accomplished for testing system's stability, resulting in negligible accuracy variations.
Published in: IEEE Transactions on Instrumentation and Measurement ( Volume: 69, Issue: 6, June 2020)
Page(s): 2790 - 2797
Date of Publication: 04 July 2019

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